Malicious PDF — malware analysis report

Static analysis result for SHA-256 c614b2e6a59d603c…

MALICIOUS

PDF

44.1 KB Created: 2020-10-27 18:09:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 71ed44512179be71b9ba327b117dcedf SHA-1: d9cb3db36048dda4c2c82a6448a0738ce7ebaebc SHA-256: c614b2e6a59d603c76d1a1bcc1285de68cec86bf6c0663b4dab19bf38520ba8d
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.link/pify?keyword=martha+rogers+theory+applied+to+nursing+practice In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408336/normal_5f93c59cc6aa7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376870/normal_5f8bc01c611b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421466/normal_5f97df6b06ad2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369304/normal_5f8a8f4e12295.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368788/normal_5f91f7c3d7728.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374688/normal_5f8aae5181ad2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369190/normal_5f8fe9cb524b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375700/normal_5f977fe3bf576.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380379/normal_5f9090fed28cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366659/normal_5f871f0e4ba33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365613/normal_5f87646756fb7.pdfIn PDF document text
    • https://pibazafefudo.weebly.com/uploads/1/3/0/7/130776509/af108.pdfIn PDF document text
    • https://xepajozojiv.weebly.com/uploads/1/3/4/4/134476610/52ea5a.pdfIn PDF document text
    • https://xumusiroti.weebly.com/uploads/1/3/4/3/134321309/dasoluguvojisorobome.pdfIn PDF document text
    • https://zuvubexusemeto.weebly.com/uploads/1/3/4/3/134373725/tidebaz.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/9b6e7aadaa78.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006c9d.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006c9d.bin)
    • https://s3.amazonaws.com/rufonali/edema_cerebral_nios.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn extracted file (font_00_sfnt_off00006c9d.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9D 5444 bytes
SHA-256: d593817baa5c84c5e4f66ae6a8bc78a4d160f0336ea025ed978af4a36887edab
font_01_sfnt_off00007f28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F28 10708 bytes
SHA-256: 9a0842591c1698e9cfb41cb76bb8158aecfd9f5ca5c7676f916cf4c51de67bfc